Just wondering, I'm kind of out of the loop when it comes to the RotF toys, but with characters from the first movie (like Prime, Ratchet, Ironhide, Megatron, Starscream, etc.) with they get completely new molds or just slight re-molds and/or repaints?
Leader Prime keeps the alt-mode, but has an entirely new toy with a more accurate transformation scheme. Definitely an improvement. Voyager version is repainted. Megatron gets an entirely new mode in keeping with the movie, so he's got a new leader and a new voyager. Ironhide's getting a grey recolor and a new gun. And a resculpted head. Ratchet's getting a tan and gray repaint. No other known changes Starscream's mold is completely new and improved. Movie 1 figure is getting Ramjet and Skywarp repaints. Bumblebee's getting too many changes to list here. check Bumblebee (Movie) toys - Transformers Wiki Barricade's being released with a new accessory to replace frenzy. Jazz is getting repainted as Smokescreen Deluxe Brawl's getting a tan repaint like his leader version. Blackout/Evac has a new blue deco called Whirl Wreckage has a green/brown paintjob as Bludgeon there may be a few things I've missed, but that should help.